// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Collections.Generic;
using System.Collections.Immutable;
using Microsoft.CodeAnalysis.Diagnostics;
using Roslyn.Utilities;
using ReferenceEqualityComparer = Roslyn.Utilities.ReferenceEqualityComparer;
 
namespace Microsoft.CodeAnalysis
{
    /// <summary>
    /// Holds input nodes that are shared between generators and always exist
    /// </summary>
    internal static class SharedInputNodes
    {
        public static readonly InputNode<Compilation> Compilation = new InputNode<Compilation>(b => ImmutableArray.Create(b.Compilation));
 
        public static readonly InputNode<CompilationOptions> CompilationOptions = new(b => ImmutableArray.Create(b.Compilation.Options), ReferenceEqualityComparer.Instance);
 
        public static readonly InputNode<ParseOptions> ParseOptions = new InputNode<ParseOptions>(b => ImmutableArray.Create(b.DriverState.ParseOptions));
 
        public static readonly InputNode<AdditionalText> AdditionalTexts = new InputNode<AdditionalText>(b => b.DriverState.AdditionalTexts);
 
        public static readonly InputNode<SyntaxTree> SyntaxTrees = new InputNode<SyntaxTree>(b => b.Compilation.SyntaxTrees.ToImmutableArray());
 
        public static readonly InputNode<AnalyzerConfigOptionsProvider> AnalyzerConfigOptions = new InputNode<AnalyzerConfigOptionsProvider>(b => ImmutableArray.Create(b.DriverState.OptionsProvider));
 
        public static readonly InputNode<MetadataReference> MetadataReferences = new InputNode<MetadataReference>(b => b.Compilation.ExternalReferences);
    }
}